fix changelog

CHANGELOG

@@ -147,6 +147,7 @@ v 8.12.0 (unreleased)
   - Fix Gitlab::Popen.popen thread-safety issue
   - Add specs to removing project (Katarzyna Kobierska Ula Budziszewska)
   - Clean environment variables when running git hooks
+  - Fix Import/Export issues importing protected branches and some specific models
   - Fix non-master branch readme display in tree view
 
 v 8.11.6
@@ -158,9 +159,6 @@ v 8.11.6
   - Restore SSH Key title auto-population behavior. !6186
   - Fix DB schema to match latest migration. !6256
   - Exclude some pending or inactivated rows in Member scopes.
-  - Fix Import/Export issues importing protected branches and some specific models
-
-v 8.11.6 (unreleased)
 
 v 8.11.5
   - Optimize branch lookups and force a repository reload for Repository#find_branch. !6087